______________ is undesirable in thermocouples used in industries ?

Byadmin March 5, 2019August 24, 2021

______________ is undesirable in thermocouples used in industries ?

A. Linear relation of emf to temperature
B. Corrosion resistance
C. Oxidation resistance
D. Non-linear relation of emf to temperature

Process Control and Instrumentation

Vapour actuated pressure spring thermometer does not require ambient temperature compensation. Ambient temperature compensation is provided in gas or liquid expansion pressure spring thermometer by__________________?

Vapour actuated pressure spring thermometer does not require ambient temperature compensation. Ambient temperature compensation is provided in gas or liquid expansion pressure spring thermometer by__________________?

A. Making the volume of thermometer bulb as large as conveniently possible
B. Reducing the volume of the capillary to a minimum
C. Reducing the volume of the receiving element to a minimum
D. All A , B & C.

Read More Vapour actuated pressure spring thermometer does not require ambient temperature compensation. Ambient temperature compensation is provided in gas or liquid expansion pressure spring thermometer by__________________?
Process Control and Instrumentation

The maximum service temperature for fibre glass used as thermocouple wire insulation material is __________ °C?

The maximum service temperature for fibre glass used as thermocouple wire insulation material is __________ °C?

A. 250
B. 500
C. 750
D. 1000

Read More The maximum service temperature for fibre glass used as thermocouple wire insulation material is __________ °C?
Process Control and Instrumentation

The amplitude ratio for the sinusoidal response of a _____________ is 1?

The amplitude ratio for the sinusoidal response of a _____________ is 1?

A. First order system
B. Second order system
C. Transportation lag
D. None of these

Read More The amplitude ratio for the sinusoidal response of a _____________ is 1?
Process Control and Instrumentation

Small furnace draught is accurately measured by an inclined tube manometer, in which the manometric liquid used most commonly is __________________?

Small furnace draught is accurately measured by an inclined tube manometer, in which the manometric liquid used most commonly is __________________?

A. Water
B. Carbon tetrachloride
C. Paraffin
D. Ethylene glycol

Read More Small furnace draught is accurately measured by an inclined tube manometer, in which the manometric liquid used most commonly is __________________?
Process Control and Instrumentation

Zirconia probe is used for the continuous measurement of ______________ flue gases going out of the furnace?

Zirconia probe is used for the continuous measurement of ______________ flue gases going out of the furnace?

A. Oxygen in
B. Carbon dioxide in
C. Carbon monoxide in
D. Temperature of

Read More Zirconia probe is used for the continuous measurement of ______________ flue gases going out of the furnace?
Process Control and Instrumentation

The ______________ of a vapor pressure thermometer is a primary element?

The ______________ of a vapor pressure thermometer is a primary element?

A. Pointer
B. Bourdon tube
C. Bulb
D. None of these

Read More The ______________ of a vapor pressure thermometer is a primary element?

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